Grading Word-Building Appeals: Vowel Rules and Element Order
A community-college medical terminology instructor is grading a word-building practical. Students build terms from elements, and the rubric awards points for correct root order and combining-vowel placement, not merely for a recognizable word. Three submissions are on appeal from 12 students: (1) gastr/enter/itis, offered for inflammation of the stomach and small intestine; (2) choledoch/o/jejun/ostomy, offered for a surgical connection between the common bile duct and the jejunum; (3) duodenocholedochectomy, offered for excision of part of the common bile duct. A fourth term, esophagogastroduodenoscopy, was dictated in class, and students could not agree whether the -o- before -scopy should be dropped. The department chair wants a one-paragraph rationale per ruling that a student could follow.
1. Rule on submission (1) and state the combining-vowel principle that decides it.
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Ruling: partly correct - element order is right, linking vowel is wrong.
Correct spelling: gastroenteritis.
- Roots in anatomic flow: gastr/o (stomach) then enter/o (intestine). The GI convention is upstream-to-downstream, so stomach-first satisfies the order criterion - award those points.
- Combining vowel rule: keep -o- between two roots; drop it before a suffix that begins with a vowel.
- gastr/o + enter/o → gastroenter- (vowel retained between roots, even though enter- begins with a vowel).
- enter/o + -itis → enteritis (vowel dropped; -itis starts with a vowel).
- Result: gastr + o + enter + itis = gastroenteritis.
Deduct for writing the roots unjoined. Test the rule against a control: gastr/o + -megaly keeps the vowel (gastromegaly) because -megaly begins with a consonant - proving the student's rule is not "always drop the vowel between elements."
2. Is submission (2), choledoch/o/jejun/ostomy, correctly built? Give the standard spelling and justify each vowel.
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Ruling: wrong written form; right elements in the right order.
Standard spelling: choledochojejunostomy.
- Junction 1, choledoch/o + jejun/o: root-to-root, so the -o- is retained → choledochojejun-.
- Junction 2, jejun/o + -stomy: -stomy begins with a consonant (s), so the combining vowel is kept → jejunostomy.
- The student wrote "jejun/ostomy," deleting exactly the vowel that must survive. Slashes are classroom notation, not part of the term - the graded answer is the spelled word.
Contrast to make the rule visible: jejun/o + -itis gives jejunitis (vowel dropped before a vowel-initial suffix), while jejun/o + -stomy gives jejunostomy (vowel kept). Same root, different suffix initial - different spelling. Note also that the order follows anatomic flow: duct emptying into jejunum.
3. Rule on submission (3) and on the esophagogastroduodenoscopy question.
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(3) Ruling: the term does not match the definition - reject it on meaning, not just mechanics.
- Elements: duoden/o (duodenum) + choledoch/o (common bile duct) + -ectomy (surgical removal). Read literally, the term means excision of the duodenum and the common bile duct, which is not the stated definition.
- For excision of part of the duct alone: choledoch/o + -ectomy → choledochectomy (vowel dropped; -ectomy is vowel-initial).
- Teaching point: a word can be spelled legally and still be wrong. Always parse the built term back into English and compare it to the definition.
Esophagogastroduodenoscopy: correct as dictated - keep every -o- before -scopy.
- esophag/o + gastr/o → esophago-gastr- (vowel kept between roots)
- duoden/o → esophagogastroduoden- (vowel kept between roots)
- -scopy → -scopy begins with a consonant, so the vowel is kept: duodenoscopy.
- Students who drop it are applying the vowel-initial-suffix rule to a consonant-initial suffix.